Cooling fin structure for internalcombustion engines



W. B. BRONANDER I COOLING FIN STRUCTURE FOR INTERNAL-COMBUSTION ENGINES Filed Sept. 23, 194A 2 Sheet-Sheet 1 INVENTOR M'Mdm 5. 8102mm! ATTORNEY Wmv. Q, HQ RQNANDER 1L1 COOLING FIN STRUCTURE FOR INTERNAL-COMBUSTION ENGINES 2 Sheets-Sheet 2 Filed Sept. 23, 1944 w R 4 0m WM 7 M 3 m a W1 Patented Nov. 9, 1948 COOLING FIN STRUCTURE FOR INTERNAL COMBUSTION ENGINES Wilhelm a. Bronandcr, Montclalr, N. J, Application September 23, 1944, Serial No. 555,545

x 1 Claim. 1

This invention relates to internal combustion engines, and particularly to means for protecting the cooling fins thereof. I

Cooling fins of aluminum or like ductile metal are easily bent or warped out-of shape and, therefore, do not provide for the eilicient circulation of or passage of air therebetween.

This invention has for its salient object to provide means for protecting the cooling flns of an internal combustion engine. I

Another object of the invention is to provide a still or rigid'support for an air deflector for confining the air and directing the cooling air between the flns and around the cylinder of an engine.

Further objects of the invention will appear from the following specification taken in connection with the drawings which form a part of this application, and in which Fig. 1 is an elevational view of a stifl'ening or protecting ring constructed in accordance with V the invention;

Fig. 2 is a sectional elevation taken substantially on line 2-2 of Fig. 1, looking in the direction of the arrows;

Fig. 3 is an enlarged sectional elevation taken substantially on line 3-3 of Fig. 1, looking in the direction of the arrows;

Fig. 4 is a perspective view of a clip used for securing the ends of the ring together;

Fig. 5 is a sectional elevation taken substantially on line 55 of Fig. 1 and showing the clip securing the ends of the ring together;

Fig. 6 is a fragmentary plan view of portion of a deflector plate;

Fig, '7 is a longitudinal sectional elevation, broken away, showing a portion of an engine cylinder and cooling fins and a protecting ring secured to the cylinder, and also a portion of a deflector plate secured to the outer periphery of the ring.and surrounding the outer edges of the cooling fins;

Fig. 8 is a sectional elevation taken substantially on line. 8-8 of Fig. 7, looking in the direction of the arrows;

Fig. 9 is a sectional elevation of a portion of the cylinder wall showing a ring constructed in accordance with the invention and secured in an end groove therein; and g Fig. 10 is a sectional elevation illustrating a portion of the cylinder wall, cooling fills, a protecting ring and a deflector, all constructed in accordance with the invention.

In the particular embodiment of the invention illustrated there is shown aportion of a cylinder an edge 20 having formed in the outer surface theme! a plurality of parallel circumferential grooves 2| in which a plurality of double walled fin "units22are secured. These fin units may be of any desired construction and in the form of the invention illustrated the walls 23 and 24 of each unit are secured in the grooves 2| by compressing material 25 in the grooves, thereby forcing the walls laterally into firm gripping engagement with the walls of the groove. L The fins 2| are preferably formed of aluminum or some similar light ductile metalbut this m'aterial is easily bent out of shape and when the flns are bent they do not permit the efllcient circulaticn of the cooling medium. In order to protect the fins the end groove has secured therein a channel shaped ring 3| having flanges 32 and 33 at the inner and outer peripheries thereof. This ring 3| is formed of relatively still or rigid metal, such as stainless steel, and the ring is provided for the purpose of protecting the fins and not as a cooling fin since stainless steel and like material d es not form an eflicient heat conductor.-

The inner flange 32 is placed in the groove ll and is anchored or secured therein by a caulking wire 34 formed of aluminum or like ductile metal.

The ring 3! has formed therein, adjacent the outer periphery thereof, a plurality of slots 8| which are arranged circumferentially. Moreover, the ring 3| is slit at 36 and forms with the inter secting slot a T-shaped slot. This permits the two ends 31 and 38 to be sprung apart soithat the ring can be expanded and placed aroundthe cylinder and in the groove 30. a

The two ends of the ring are provided with parallel slots 39 and 40 and the ends of the ring are secured together by means of a clip, shown particularly in Figs. 4 and 5. This clip is U- shaped in section and comprises a central portion II and end portions 42 and 43 initially disposed substantially at right angles to the portion lll. Notches 44 are formed in the portions 42 and II. The clip is secured in the manner shown in Fig. 5 by passing the portions 42 and 43 and, as shown particularly in Fig. 8, deflects the air and confines the air to the spaces between the flns and in contact with the outer wall of the cylinder. The deflector plate has formed on the lower edge thereof, viewing Fig. '7, a plurality of l that simple and practical protecting means has been provided for preventing the accidental bending or warping of the fins of an internal combustion engine. Furthermore, a practical and efilcient means has been provided for securing a deflecting plate around the fins.

Although one specific embodiment of the invention has been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of theinvention, as expressed in the following claim. 4

What I clainris:

In combination, a cylindrical member to be cooled, a plurality of cooling fins mounted on'and encircling said member, an annular protector ring for the fins secured to said member. said protector ring being formed of material stifi'r than the material or the cooling fins to be protected, said protector ring comprising a ring channeled in section and having flanges at the inner and 30 outeruperiphery thereof. said protector ring being split and having formed therein opposite the split a slit extending from the inner periphery to an elongated slot disposed adjacent the outer flange and extending substantially at right angles in opposite directions from the slit whereby the ring can be bent at the slit to open up the ring. and means tor securing a deflector plate to said protector ring.

' WILHELM 1B. BRONANDER.

file of this patent:

UNITED STATES PATENTS Number Name Date 283,138 Mosler Aug. 14, 1883 912,545 Duryea Feb. 16, 1909 1,555,480 Oicott Sept. 29, 1925 1,681,150 Vischer, Jr. Aug. 14, 1928 1,847,878 Kleucker Mar. 1, 1932 1,854,278 Smith Apr-.19, 1932 1,921,278 Young Aug, 8, 1933 2,036,417 Laird Apr. 7, 1939 2,057,010 Chilton Oct. 13, 1936 2,080,885 Ashe May 18, 1937 2,330,065 Lucke Sept. 21, 1943 2,383,224 Bronander Nov. 21, 1944 FOREIGN PATEN'I'B Number Country Date 475,887 Great Britain Nov. 29, 1937 Great Britain Aug. 19, 1940 

